Rotary table for drilling machines



2 Sheets-Sheet 1 -Jllllllllll'm R M GALLOWAY ET AL ROTARY TABLE FORDRILLING MACHINES Filed Feb. 26, 192

Feb. 9 1926.

Feb. 9 1926. 1,572,476

' R. M. GALLOWAY El AL ROTARY TABLE FOR I DRILLING MACHINES Filed Feb.26, 192: 2 Sheets-Sheet z V////////////////////////J///////////JIIIIIIII Patented Feb. 9, 1926.

UNITED STATES PAT ENT OFFICE.

ROBERT m. GALLowAY AND ALFRED G. SUDHOFF, or RIc 'TmoND, INDIANA, s-SIGNORS To THE NATIONAL AUTOMATIC ooLc0MrANY, or RICHMOND, INDIA A,

A CORPORATION 01 INDIANA.

ROTARY TABLE FOR DRILLING MACHINES.

Application filed February 26, 1923. Serial No. 621,163.

To all whom-it may concern:

Be it known that we, ROBERT M. GALLO- WAY and ALFRED G. SUDHoFr,citizens of the United States, residing at Richmond, in the county ofWayne and State of Indiana, have invented certain new and usefulTmprovements in Rotary Tables for Drilling Machines, of which thefollowing 1s a spec:- fication.

Our, invention relates to rotary tables such as used with drillingmachines,v an example of which may be seen in the atent granted February8, 1921, No. 1,367 ,5 9, on an invention of William M. Ziegler andAlfred G. Sudhoif. There is a showing in this off 0 its seat or trackand for indexing it, such means taking the form of two separate levers,one of them serving to lift the'table and the other to unlock it.

The main object of our present invention is to much simplify the tablelifting and indexing mechanism and in carrying out this object wedispense with the necessity for two separateappliances such as thelovers just mentioned and provide for the lifting of the table and itsunlocking by one and" the same act. Thus a single lever or treadleserves for both purposes and the operator has his hands that much freerfor simultaneously performing other manipulations.

In the drawings which accompany and form part of this specification,Fig. 1 represents a topplan view of a table having our invention appliedto it in one form, the top of the table and part of the base beingbroken away and some portions shown in horizontal section for the betterportrayal of the invention; Fig. 2 is a vertical section taken on theline 2-2 of Fig. 1; Fig. ,3 is another vertical section taken at rightangles to Fig. 2 on the line 33 of Fig. 1; Fig. 4 is a view similar toFig. 3 showing a some What different form of embodiment of theinvention; Fig 5 is a fragmentary sectional plan view takensubstantially on the line 55 of Fig. 4; Fig. 6 is a detached perspectiveview of the head of a latch for the indexing bolt employed in theconstruction illustrated by. Figs. 1 and 3; and Fig. 7 is a fragmentaryelevation illustrating a further modification.

of the structure which is of skeleton form atent of means for raisingthe table and has at the center a bearing 3 receiving the journal stud4. of the table 5/ The base has a track or seat 6 which encircles thecentral bearing and the table has a circular foot formation 7, to restupon said. track or seat so that the table will be evenly and solidlysupported when work is\on 1t and being operated upon. The journal stud 4is slidable up and down in the bearing 3 so that thetable may be liftedoff of its seat when it is to be rotated. For indexing purposes a seriesof sockets 8 are formed in the foot portion of the table and pref erablyhushed, and the base is formed with a boss 9 with a bushing in which abolt is vertically slidable for entrance into and withdrawal from thesesockets.

The central journal stud 4 is recessed in its under-side for theaccommodation of a single anti-friction ball 10 which seats in thesimilar recess of a hardened block '11 set in the short inner arm of alever 12. The latter is pivoted at 13 in the base of the ap paratus andits longer arm extends outwardly and is coupled to an operating leverextending at right angles to it. Obviously depression of the long arm ofthis lever 12 will result in lifting the table upon the ball bearing sothat the table will be free from i the track or seatand may be easilyturned.

Thus far the construction is the same in both illustrated forms ofembodiment of the invention. Referring now more particularly to Figs. 1and 3,. the operating lever is designated 14, the same being pivoted at.its inner end'to the base, as shown at 15. This lever is coupled. to thetable-lifting lever 12 adjacent the pivot 15 by a shackle bolt 16', theeye of which engages a cross in' in the. lever 14 and the shank of whicextends through the long arm of the lever 12 and receives a nut over awasher and bearing block, the latter of semispherical form and engaginga complemental'socket formed in the lever. The op- 4 erating lever 14extends outwardly beyond the table where it hasa handle 15' and it willbe obvious that by pressing down. on that handle the table may be liftedin the manner already mentioned. -The indexing bolt is designated by thenumeral 17 and it' extends freely through an opening 17 in the lever 14.It-is bored out to receive a compression spring 18 which is confined ining soc et of the table.

a suitable seat; 19 onthe base of the apparatus and which serves tothrust the bolt upwardl for engagement with the indexangular slots 20are formed in opposite sides of this hollow bolt and the lever 14carries a latch normally engaging the short horizontal upper portions ofthese slots so thatv when the lever 14 is depressed the bolt 17 will becarried down with it and so withdrawn from the table. socket. This latchcomprises a head 21 and a stem 22 occupying a recessed under portion ofthe lever 14 is coupled at its outer end to a latch lever v 26 pivotallysuspended from the outer portion of the operating lever 14.

Still referring to the 'form of construetion illustrated by Figs. 1, 3and 6, when occasion arises for rotating the table asv for the properpositioning; or re-positioning of work upon 1t under t e drills of adrilling machine, the operator has merely to push down the outer end ofthe operating lever 14, thereby lifting the table in the manner alreadydescribed and at the same time withdrawing the bolt 17 from the, tablesocket. Then with the same hand he will operate;the latch lever26,-having started to turn the table with his other hand, and thisworking of the latch lever will draw the latch outwardly and bring itsstuds 24 in line with the vertical portions of the slots- 20 whereuponthe spring 18, which was of course compressed when the bolt was forceddown, will drive the bolt upwardly against the foot portion of the tableready tosprin'g into the next soeket'as soon as' the table has beenturned the corresponding distance. Of course the studs 24 do not leavethe slots 20. and thereforeas soon as the lever 14 is released and riseswith the dropping of the table onto its seat these studs travel up theslots 20 and, the latch lever 26 having been released, spring 25 willthrow the studs into the horizontal ortions of the slotsso that thenormal con ition is restored. 5

Referring next to the further simplified construction illustrated byFigs. 4 and 5, the operating lever is designated by the numeral 30 andis coupled to the lever 12 in just the same Way as already described inconnection with the other form of construction. The difference betweenthe two constructions has to do with the relationship between theoperating lever and the indexing bolt. The latter is here designated 31and, unlike the bolt of the first described Corresponding the lever 30may construction, it does not have vertical movement independently ofthe operating lever, but is permanently coupled to the latter 'so as to,move up and down with it.- To this end the bolt, where it extendsthrough the in one side, and, a bolt 33 is run crosswise through thelever as best shown in Fig. 5 so as to occupy said notch, sufficientplay beingfallowed for, to accommodate the arc of movement the lever.tion the bolt does not have a spring applied directly to it; its lowerend simply slides in a boss formed on the bottom part of the base.Between the bolt and the pivot of the operating lever a spring-35 isdirectly applied to the lever, being received at .the

upper end in-a recess of the-lever and at the lower end in a recess onthe base. This is a compression spring likethe spring 18 of the firstdescribed construction and it fume-- tions to keep the and indexingmecanism in proper normal s ate with the bolt in the table socket. Quiteobviously a spring might be otherwise applied for the purpose, as e. g.,by extending the same between the lever and the overhangin portion ofthe base in the manner shown y Fig. 7 wherein the spring is designated35 and engages at one end in an eye-lug on the base and at the other endwith a stud on an ear of the lever.

It will be seen that in the use of the last described form of embodimentof the invention depression of the outer end of the arts of the tablelifting lever, is formed with a cross slot or notch 32 In thisconstrue.-

operating lever 30 will lift the table off its table socket and thatthis will be done in opposition to the spring 35 but in this sim- Yplified construction there is no additional operation such as the workinof a latch. As soon as the'table is start in rotation be released andbeing moved upward by the weight of the table and alsothe expansion ofthe spring 35 will carr. with 1t.the bolt 31 so that the latter Wlll beressin against the foot portion of the ta le re y to instantly enter thenext socket therein. As soon as that.

occurs the table ain drops upon its seat.

Either .form 0 construction above described fulfills the objectprimarily stated and it is to be understood that the invention .may beembodied in still different-forms within the scope of claims whichfollow:

We claim:

1. The combination of a base, a table mountedto rotate over said baseand to rest upon the same, means for holding tlie'table at differentpositions of rotation, means for lifting the table off its seat, andmeans for operating said lifting means with provisions for alsoreleasing the table from its holding means by'operation of said liftingmeans.

2. The combination of a base, a table mounted to rotate over said baseand to rest upon the same, and having a series of indexing sockets, abolt for engaging the same to hold the table at different positions ofrotation, means for lifting the table off its" seat, and means foroperating said litting means with provisions for also withdrawing thebolt by operation of said litting means.

The combination of a base having a central bearing and an encirclingtrack, a table having a journal stud occupying said bearing and a seriesof sockets over the base track, a bolt to engage said sockets, a leverextending under the table stud, and another.

lever engaging the first mentionedi one for operating the same to liftthe table, said second' lever also engaging the bolt to withdraw it fromthe table-socket 4. The'combination of a base having a central bearingand an encircling track, a

table having a journal stud occupying said bearing and a series ofsockets over the base track, a bolt mounted to slide vertically in.

the base and engage the sockets in the table, a lever permanentlyengaged with said bolt for moving it up and down, and connections forlifting the table simultaneously with retraction of the bolt.

5. The combination of a base having a central bearing and an encirclingtrack, a table having a journal stud occupying said bearing and a seriesof sockets over the base track, a bolt mounted to slide vertically inthe base and engage the sockets in the table, a lever permanentlyengaged with said bolt for moving it up and down, a spring applied tothe lever, and connections for, lifting the table simultaneously withretraction of the bolt.

6. The combination of a base having a central bearing and an encirclingtrack, a table having a journal stud occupying said bearing and a seriesof sockets over the base track, a bolt mounted to slide vertically inthe base and engage the sockets in the table, alever pivoted beneath thetable and extending under the latters j onrnal stud on one side of itspivot, 21 second lever extending at right angles to thefirst and coupledto the latter on the other side of its pivot, and apermanent connectionbetween the bolt and the second lever on the same side of the latterspivot as the coupling between the two levers.

7; The combination of a base having a central bearing and an encirclingtrack, a table having a journal stud occupying said bearing and a seriesof sockets over the base track, a bolt mounted to slide vertically inthe base andengage the sockets in the table, a lever pivoted beneath thetable and extending under the latters journal stud on one side of itspivot, a second lever extending at right angles to the first and coupledtothe latter on the other side of its pivot, a permanent connectionbetween the bolt and the second lever on the same side of the latterspivot as the coupling between the two levers, and a compression springbelow the second lever also on that same side of its pivot.

ROBERT M. GALLQVVAY. ALFRED G. SUDHOFF.

